Michel: Thanks for the Findable base class ideas. I attempted to create a Findable class and made a small mistake. I named the method to perform deletion "delete" Of course now anyhting to do with that object produces a KeyError. I can't delete it, or look inside it. Just a heads up on the taboo name "delete" in ZClasses. Is there any other taboo names I should be aware of? Also you mentioned add, delete and findable methods for this base class. Doesn't adding something to the Catalog automatically render it findable? All my best, -- Jason Spisak webmaster@mtear.com